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kernel: usercopy functions

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Matheus
2024-06-09 19:31:26 -03:00
parent 429f56aced
commit 50b4b45d00
53 changed files with 712 additions and 260 deletions
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kernel-src/arch/x86-64/mmu.c
+18 -6
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@@ -263,6 +263,7 @@ static volatile struct limine_kernel_address_request kaddrreq = {
#define ERROR_FETCH 16
static void pfisr(isr_t *self, context_t *ctx) {
thread_t *thread = _cpu()->thread;
interrupt_set(true);
int vmmerror = 0;
if (ctx->error & ERROR_PRESENT)
@@ -275,18 +276,29 @@ static void pfisr(isr_t *self, context_t *ctx) {
vmmerror |= VMM_ACTION_EXEC;
if (vmm_pagefault((void *)ctx->cr2, ctx->cs != 8, vmmerror) == false) {
if (ARCH_CONTEXT_ISUSER(ctx))
signal_signalthread(_cpu()->thread, SIGSEGV, true);
else
if (thread->usercopyctx) {
memcpy(ctx, thread->usercopyctx, sizeof(context_t));
thread->usercopyctx = NULL;
CTX_RET(ctx) = EFAULT;
} else if (ARCH_CONTEXT_ISUSER(ctx)) {
signal_signalthread(thread, SIGSEGV, true);
} else {
_panic("Page Fault", ctx);
}
}
}
static void gpfisr(isr_t *self, context_t *ctx) {
if (ARCH_CONTEXT_ISUSER(ctx))
signal_signalthread(_cpu()->thread, SIGSEGV, true);
else
thread_t *thread = _cpu()->thread;
if (thread->usercopyctx) {
memcpy(ctx, thread->usercopyctx, sizeof(context_t));
thread->usercopyctx = NULL;
CTX_RET(ctx) = EFAULT;
} else if (ARCH_CONTEXT_ISUSER(ctx)) {
signal_signalthread(thread, SIGSEGV, true);
} else {
_panic("General Protection Fault", ctx);
}
}
void arch_mmu_init() {